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Eprom blowerdoes anyone know a site with plans for an eprom programmer project that'll blow 27C256s. I attempted to build one called Kisseprom, but the software …
... can be 4.5-5.5V and still be within specs ... be programmed reliably at VCC=5V; the rest require 6-6 ... .5V, depending on type.
The ... a 5.7 and 6.5V VCC option.
Using USB ... -
ZX81 power supplyFriend gives me ZX81 without power supply and i want to test whether he work or not. Can i use Spectrum p.supply for that purposes? I dont want to d…
... bring the input down to +5V, but you will need to ... -
ZX81 Composite Video Mod?Hello. Does anyone know how to modify a ZX81 to output composite video as opposed to a modulated RF signal? I believe it can be done with one trans…
... connect at UHF modulator pins (+5V,GND and Video IN) -
ZX81 Composite Video Mod?Hello. Does anyone know how to modify a ZX81 to output composite video as opposed to a modulated RF signal? I believe it can be done with one trans…
... ) is the ground connection. The +5V is the wire that appears ... -
ZX81 Composite Video Mod?Hello. Does anyone know how to modify a ZX81 to output composite video as opposed to a modulated RF signal? I believe it can be done with one trans…
... connect at UHF modulator pins (+5V,GND and Video IN)[/QUOTE ... -
spectrum PSU'sI've read contradictory info on which psu(ie amp rating) is for which spectrum. :confused: The models and amp ratings are 1.2A, 1.4, 1.85 and 48k, …
... , which are +12V, -12V and -5V. These voltages go off to ... -
ZX81 power supplyFriend gives me ZX81 without power supply and i want to test whether he work or not. Can i use Spectrum p.supply for that purposes? I dont want to d…
... power adapter" and use 7.5V output voltage.
- it's ... -
Sinclair +2 to VGA without VGA boxA few days ago someone in a Spanish forum mentioned that his friend claimed to have built a cable to connect his Sinclair +2 to a VGA monitor without…
... for H/V sync signals, +5V (and maybe +12V) power supply ... -
Sinclair +2 to VGA without VGA boxA few days ago someone in a Spanish forum mentioned that his friend claimed to have built a cable to connect his Sinclair +2 to a VGA monitor without…
... for H/V sync signals, +5V (and maybe +12V) power supply ... -
Alternative chips for upper RAM blockDoes anybody know of a way to use 4464 chips instead of 4164 for the upper RAM block in a 48K machine? If not 4464 then something a little more avai…
... 10). This ties A7 to +5V converting a 64kx4 into a ... -
Sinclair +2 to VGA without VGA boxA few days ago someone in a Spanish forum mentioned that his friend claimed to have built a cable to connect his Sinclair +2 to a VGA monitor without…
... /> No, C128 have TTL (0-5V) RGB output. ZX_Spectrum is analogue ... -
Alternative chips for upper RAM blockDoes anybody know of a way to use 4464 chips instead of 4164 for the upper RAM block in a 48K machine? If not 4464 then something a little more avai…
... 10). This ties A7 to +5V converting a 64kx4 into a ... -
ZX81 Composite Video Mod?Hello. Does anyone know how to modify a ZX81 to output composite video as opposed to a modulated RF signal? I believe it can be done with one trans…
... going into modulator box, tapped +5v from the right hand of ... -
ZX81 Composite Video Mod?Hello. Does anyone know how to modify a ZX81 to output composite video as opposed to a modulated RF signal? I believe it can be done with one trans…
... going into modulator box, tapped +5v from the right hand of ... -
PC Power supply for SpeccyHi all, after 13 years with out playing spectrum games I am eager to play the old games. Thus I got up to the garret checking my old stuff. Two of m…
... to make all internal voltages (5V and 12V). Of course you ... -
RGB cable problemI bought an RGB cable from a Polish dealer on Ebay for my Spectrum 128+, but I can only get an AV signal from it. I sent it back to him and he gave m…
... 220 Ohms resistor to the +5V line. I don?t have ... -
ZX Spectrum Power Cable on +2AHi, Today I bought a +2A, but it is lacking a power cable. I rooted around and found one, but it is for an ordinary ZX Spectrum. Will it work? This…
... relevant voltages (is it 12V 5V and -5V, I've forgotten, it ... -
ZX Spectrum Power Cable on +2AHi, Today I bought a +2A, but it is lacking a power cable. I rooted around and found one, but it is for an ordinary ZX Spectrum. Will it work? This…
... and silicon. 2A on the 5V line and 1A on the ... -
I want to build a new, super spectrum ;-)only kidding Andrew :-) my brain's going at a mile a minute at the moment, so I thought I should put some of the ideas down in case one of them is w…
... datasheet says that the +12v/-5v supplies should be turned on ... and turned off after the 5v supply or internal biasing conditions ... what happens, since the +12v/-5v supply ceases).
... you can get "simple switchers", 5v switch mode power supply ICs ... -
I want to build a new, super spectrum ;-)only kidding Andrew :-) my brain's going at a mile a minute at the moment, so I thought I should put some of the ideas down in case one of them is w…
... some of them work with +5v) and it's 100% safe ... -
I want to build a new, super spectrum ;-)only kidding Andrew :-) my brain's going at a mile a minute at the moment, so I thought I should put some of the ideas down in case one of them is w…
... , without any regulation !. For the -5V power it use one ICL7660 ... -
I want to build a new, super spectrum ;-)only kidding Andrew :-) my brain's going at a mile a minute at the moment, so I thought I should put some of the ideas down in case one of them is w…
... some of them work with +5v) and it's 100% safe ... -
Speccy just snuffed it while playing 3D Pinball :(I have two speccys but the one I use most has just given up the gost! :-( game froze up and now all I get is flashing patterns and lines:-( Everyt…
... with a multimeter that the +5v, -5v and +12v supplies are all ... -
Speccy just snuffed it while playing 3D Pinball :(I have two speccys but the one I use most has just given up the gost! :-( game froze up and now all I get is flashing patterns and lines:-( Everyt…
... with a multimeter that the +5v, -5v and +12v supplies are all ... -
PC power source and Spectrums.I'm planning to use a basic PC ATX power source (300W) for all my sinclair equipment, but I have two questions: - I've read about some nasty things …
you might be able to use the 12v line relative to the 3.3v line to get a pd of 8.7v
this might not work, I don't know how the circuit inside modern PSUs work, but I've done it with the 12v and 5v on an old style computer PSU to get 7v -
PC power source and Spectrums.I'm planning to use a basic PC ATX power source (300W) for all my sinclair equipment, but I have two questions: - I've read about some nasty things …
... it will overheat FAST), using +5v and bypass the 7805 or ...